Aromatic sulphonyl compounds having an additional thioether, sulphoxide or sulphonyl group

ABSTRACT

Sulfonyl compounds have the formula ##STR1## where n is 0, 1 or 2, 
     Y is vinyl or a radical of the formula C 2  H 4  Q, where Q is hydroxyl or an alkali-detachable group, 
     E is C 3  -C 6  -alkylene with or without interruption by 1 or 2 oxygen atoms in ether function, 
     Ar is the radical of benzene or naphthalene, and 
     R 1 , R 2  and R 3  are each hydrogen, unsubstituted or substituted C 1  -C 6  -alkyl, C 1  -C 6  -alkoxy, hydroxyl, halogen, nitro, amino, hydroxysulfonyl, carboxyl, carbamoyl, sulfamoyl, cyano or a radical of the formula (NH--) m  (CH 2  --) q  SO 2  --Y, where m is 0 or 1, q is 0, 2 or 3, and Y is as defined above.

This is the national stage of PCT/EP96/02929 filed Jul. 4, 1996.

The present invention relates to novel sulfonyl compounds of the formula I ##STR2## where n is 0, 1 or 2,

Y is vinyl or a radical of the formula C₂ H₄ Q, where Q is hydroxyl or an alkali-detachable group,

E is C₃ -C₆ -alkylene with or without interruption by 1 or 2 oxygen atoms in ether-function,

Ar is the radical of benzene or naphthalene, and

R¹, R² and R³ are independently of each other hydrogen, C₁ C₆ -alkyl with or without amino or C₁ -C₄ -alkanoylamino substitutions C₁ -C₆ -alkoxy, hydroxyl, halogen, nitro, amino, C₁ -C₄ -alkanoylamino, mono- or di(C₁ -C₆ -alkyl)amino, hydroxysulfonyl, carboxyl carbamoyl, mono- or di(C₁ -C₆ -alkyl)carbamoyl, sulfamoyl, mono- or di(C₁ -C₆ -alkyl)sulfamoyl, cyano or a radical of the formula (NH--)_(m) (CH₂ --)_(q) SO₂ --Y, where m is 0 or 1, q is 0, 2 or 3, and Y is as defined above.

It is an object of the present invention to provide novel aromatic sulfonyl compounds having an additional thioether, sulfoxide or sulfonyl group in the molecule. The novel compounds shall be easy to obtain and advantageously useful as intermediates for dyes.

We have found that this object is achieved by the above-defined aromatic sulfonyl compounds of the formula I.

Any alkyl or alkylene appearing in the formulae recited herein may be straight-chain or branched R¹, R² and R³ are each, for example, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, 2-methylpentyl, aminomethyl, 2-aminoethyl, 2- or 3-aminopropyl, 2- or 4-aminobutyl, 5-aminopentyl, 6-aminohexyl, formylaminomethyl, 2-formylaminoethyl, 2- or 3-formylaminopropyl, 2- or 4-formylaminobutyl, 5-formylaminopentyl, 6-formylaminohexyl, acetylaminomethyl, 2-acetylaminoethyl, 2- or 3-acetylaminopropyl, 2- or 4-acetylaminobutyl, 5-acetylaminopentyl, 6-acetylaminohexyl, methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy, pentyloxy, isopentyloxy, neopentyloxy, tert-pentyloxy, hexyloxy, fluorine, chlorine, bromine, mono- or dimethylamino, mono- or diethylamino, mono- or dipropylamino, mono- or diisopropylamino, mono- or dibutylamino, mono- or dipentylamino, mono- or dihexylamino, mono- or dimethylcarbamoyl, mono- or diethylcarbamoyl, mono- or dipropylcarbamoyl, mono- or dibutylcarbamoyl, mono- or dipentylcarbamoyl, mono- or dihexylcarbamoyl, mono- or dimethylsulfamoyl, mono- or diethylsulfamoyl, mono- or dipropylsulfamoyl, mono- or dibutylsulfamoyl, mono- or dipentylsulfamoyl, mono- or dihexylsulfamoyl, formylamino, acetylamino, propionylamino, butyrylamino or isobutyrylamino.

E is for example (CH₂)₃, (CH₂)₄, (CH₂)₅, (CH₂)₆, CH(CH₃)CH₂, CH(CH₃)CH(CH₃), (CH₂)₂ O(CH₂)₂, (CH₂)₂ O(CH₂)₃, (CH₂)₃ O(CH₂)₃ or (CH₂)₂ O(CH₂)₂ O(CH₂)₂.

Q is hydroxyl or an alkali-detachable group. Examples of such groups include chlorine, bromine, C₁ -C₄ -alkylsulfonyl, phenylsulfonyl, OSO₃ H, SSO₃ H, OP(O)(OH)₂, C₁ -C₄ -alkylsulfonyloxy, phenylsulfonyloxy, C₁ -C₄ -alkanoyloxy, di(C₁ -C₄ -alkyl)amino or a radical of the formula ##STR3## where L¹, L² and L³ are independently of each other C₁ -C₄ -alkyl or benzyl and An.sup.⊖ is in each case one equivalent of an anion. Examples of suitable anions include fluoride, chloride, bromide, iodide, mono- di- or trichloroacetate, methanesulfonate, benzenesulfonate and 2- or 4-methylbenzenesulfonate.

Preference is given to sulfonyl compounds of the formula I where n is 0 or 2, in particular 2.

Preference is further given to sulfonyl compounds of the formula I where E is C₃ - or C₄ -alkylene, in particular C₃ -alkylene.

Preference is further given to sulfonyl compounds of the formula I where Ar is the radical of benzene

Preference is further given to sulfonyl compounds of the formula I where R¹ is C₁ -C₄ -alkyl with or without amino or C₁ -C₄ -alkanoylamino substitution, nitro, amino or C₁ -C₄ -alkanoylamino and R² and R³ are independently of each other hydrogen, C₁ -C₄ -alkoxy, hydroxyl, halogen, hydroxysulfonyl or carboxyl.

Particular preference is given to sulfonyl compounds of the formula I where R¹ is C₁ -C₄ -alkyl with or without amino or C₁ -C₄ -alkanoylamino substitution, nitro, amino or C₁ - or C₂ -alkanoylamino, R² is hydrogen, C₁ -C₄ -alkoxy, hydroxyl, halogen, hydroxysulfonyl or carboxyl and R³ is hydrogen or hydroxysulfonyl.

Of particular industrial interest are sulfonyl compounds of the formula Ia ##STR4## where Y is vinyl, 2-sulfatoethyl, 2-chloroethyl or 2-acetyloxyethyl,

E is C₃ - or C₄ -alkylene, and

R¹ is C₁ -C₄ -alkyl with or without amino or C₁ - or C₂ -alkanoylamino substitution, nitro, amino or C₁ - or C₂ -alkanoylamino.

The sulfonyl compounds of the formula I according to the present invention can be obtained by methods known per se. Advantageously, for example, an aromatic compound of the formula II ##STR5## where E, Ar, R¹, R² and R³ are each as defined above and Q¹ has the meanings of Q other than hydroxyl, is reacted with mercaptoethanol to form the hydroxyl compound of the formula Ib ##STR6## where E, Ar, R¹, R² and R³ are each as defined above.

If desired, this hydroxyl compound can subsequently be oxidized, for example with hydrogen peroxide, to the sulfoxide (n=1 in the formula I) or sulfone (n=2 in the formula I) and, again if desired, the alkali-detachable group can be introduced subsequently, for example by esterification with sulfuric acid. However, it is also possible to introduce the alkali-detachable group into the hydroxyl compound of the formula Ib and only then to oxidize it, if desired.

The novel sulfonyl compounds of the formula I are useful intermediates for preparing reactive dyes.

The Examples which follow illustrate the invention.

EXAMPLE 1

173 g of 1-bromo-3-chloropropane were added dropwise at from 20 to 25° C. to a mixture of 200 g of 4-acetylaminobenzenesulfinic acid, 500 ml of N,N-dimethylformamide (DMF) and 152 g of potassium carbonate. The mixture was subsequently stirred at from 20 to 25° C. for 12 hours.

After the reaction had ended (TLC), the reaction mixture was poured onto 750 g of ice and subsequently stirred for 1 h. The precipitate was filtered off with suction, washed neutral with water and dried at 50° C. under reduced pressure, leaving 260 g of the compound of the formula ##STR7##

¹ H-NMR (D₆ -DMSO): δ=2.0 (m, 2H, 2-H), 2.1 (S, 3H, CH₃)

3.3 (t, 2H, 3-H)

3.7 (t, 2H, 1-H)

7.8 (brs, 4H, aromatic H) ppm.

¹³ C-NMR (D₆ -DMSO): δ=24.1 (CH₃), 26.1 (C-2), 43.0 (C-3)

52.8 (C-1), 118.9, 128.9, 132.2

144.2 (aromatic C), 169.1 (C═O) ppm.

EXAMPLE 2

a) 175 g of the compound described in Example 1 and 96.6 g of potassium carbonate were presented in 950 ml of DMF. A mixture of 81.9 g of mercaptoethanol and 220 ml of DMF was added dropwise at from 60 to 65° C. The reaction mixture was then stirred at that temperature until the reaction had ended (TLC).

After cooling, the reaction mixture was diluted with 20% strength by weight aqueous sodium chloride solution and repeatedly extracted with ethyl acetate. Removing the solvent under reduced pressure left 175 g of the compound of the formula ##STR8##

b) The compound described under a) was dissolved in 500 ml of water. Following the addition of 0.5 g of tungstic acid, 342 g of 30% strength by weight aqueous hydrogen peroxide solution were added dropwise at from 20 to 25° C. The reaction mixture was heated at 70° C. for 2 h. After the reaction had ended (TLC), the resulting precipitate was filtered off with suction at 10° C., washed with water and dried at about 30° C. under reduced pressure to leave 122 g of the compound of the formula ##STR9##

¹ H-NMR (D₆ -DMSO): δ=2.0 (m, 2H, 2-H)

2.1 (s, 3H, CH₃)

3.2 (m, 4H, 4-H, 5-H)

3.4 (t, 2H, 3-H)

3.8 (t, 2H, 1-H)

7.8 (brs, 4H, aromatic H)

11.3 (s, 1H, NH) ppm.

¹³ C-NMR (D₆ -DMSO): δ=15.8 (C-2)

24.1 (CH₃)

51.7 (C-3)

53.4 (C-1)

55.0, 55.2 (C-4, C-5 )

118.8, 128.9, 132.0, 144.1 (aromatic C)

169.1 (C═O) ppm.

EXAMPLE 3

50 g of the compound described in Example 2b were heated for 8 h at from 80 to 85° C. in 500 g of half-concentrated hydrochloric acid. The reaction solution was subsequently concentrated at 50° C. under reduced pressure to leave 50 g of the compound of the formula ##STR10##

¹ H-NMR (D₆ -DMSO): δ=2.0 (m, 2H, 2-H)

3.3 (m, 6H, 3-H, 4-H, 5-H)

3.8 (t, 2H, 1-H)

6.9 (d, 2H, aromatic H)

7.2 (brs, 3H, NH₃.sup.⊕)

7.6 (d, 2H, aromatic H) ppm.

EXAMPLE 4

172.4 g of 1-bromo-3-chloropropane were added dropwise at from 20 to 25° C. to a mixture of 186.3 g of 3-nitrobenzenesulfinic acid, 500 ml of DMF and 151.4 g of potassium carbonate. The mixture was subsequently stirred at from 20 to 25° C. for 16 h. It was then diluted with water and repeatedly extracted with ethyl acetate. Removing the solvent under reduced pressure left 165 g of a compound of the formula ##STR11##

¹ H-NMR (D₆ -DMSO): δ=2.05 (m, 2H, 2-H)

3.6 (t, 2H, 3-H)

3.7 (t, 2H, 1-H)

8.0 (t, 1H, aromatic H)

8.4 (d, 1H, aromatic H)

8.6 (m, 2H, aromatic H) ppm.

EXAMPLE 5

a) 162.6 g of the compound described in Example 4 were reacted with 94.3 g of potassium carbonate and 53.6 g of thioethanol in 650 ml of DMF in the manner of Example 2a to yield 145.2 g of the compound of the formula ##STR12##

b) The compound described under a) was then oxidized with 256 g of 30% strength by weight aqueous hydrogen peroxide solution in 120 ml of water in the manner of Example 2b. Drying the isolated product left 124 g of the compound of the formula ##STR13##

¹ H-NMR (D₆ -DMSO): δ=20 (m, 2H, 2-H)

3.2 (m, 4H, 4-H, 5-H)

3.7 (t, 2H, 3-H)

3.8 (t, 2H, 1-H)

8.0 (t, 1H, aromatic H)

8.4 (t, 1H, aromatic H)

8.6 (m, 2H, aromatic H) ppm.

¹³ C-NMR (D₆ -DMSO): δ=15.5 (C-2)

51.7 (C-1)

52.9 (C-3)

55.0, 55.2 (C-4, C-5)

122.7, 128.5, 131.6, 133.8

140.3, 148.1 (aromatic C)

EXAMPLE 6

33.7 g of the compound described in Example 5b) were dissolved in 300 g of methanol and 2 g of propionic acid. 5 g of Raney nickel were added for a hydrogenation at 40 ° C. under a hydrogen pressure of 2 bar. After the uptake of hydrogen had ceased, the catalyst was filtered off and the filtrate was freed of solvent to leave 30.0 g of the compound of the formula ##STR14##

¹ H-NMR (D₆ -DMSO):δ=1.8 (m, 2H, 2-H)

3.1-3.7 (m, 8H, 1-, 3-, 4- and 5-H)

4.3 (m, 1H, OH)

5.7 (brs, 2H, NH₂)

6.8-7.3 (t, 4H, aromatic H)

EXAMPLE 7

Example 1 was repeated with 188 g of 1-bromo-4-chlorobutane, affording 262 g of the compound of the formula ##STR15##

¹ H-NMR (D₆ -DMSO): δ=1.5-1.9 (m, 4H, 2-, 3-H)

2.1 (s, 3H, CH₃)

3.3 (t, 2H, 4-H)

3.6 (t, 2H, 1-H)

7.8 (brs, 4H, aromatic H)

10.4 (s, 1H, NH) ppm.

EXAMPLE 8

184 g of the compound described in Example 7 were reacted with 81 g of mercaptoethanol in the manner of Example 2a) and the product then oxidized in the manner of Example 2b), affording 202 g of the compound of the formula ##STR16##

¹ H-NMR (D₆ -DMSO): δ=1.6-1.9 (m, 4H, 2-, 3-H)

2.1 (s, 3H, CH₃)

3.1 (m, 4H, 5-, 6-H)

3.3 (m, 2H, 4-H)

3.8 (t, 2H, 1-H)

7.8 (brs, 4H, aromatic H)

10.4 (s, 1H, NH) ppm.

EXAMPLE 9

Example 1 was repeated with 227 g of 4-(2-acetylaminoethyl)benzenesulfinic acid, affording 258 g of a compound of the formula ##STR17##

¹ H-NMR (D₆ -DMSO): δ=1.8 (s, 3H, CH₃)

2.0 (q, 2H, 4-H)

2.8 (t, 2H, 2-H)

3.3 (t, 2H, 5-H)

3.4 (m, 2H, 1-H)

3.7 (t, 2H, 3-H)

7.5 (d, 2H, aromatic H)

7.8 (d, 2H, aromatic H)

8.0 (brs, 1H, NH).

EXAMPLE 10

Example 2 was repeated with 192 g of the compound described in Example 9, affording (on drying under reduced pressure) 185 g of the compound of the formula ##STR18##

¹ H-NMR (D6-DMSO): δ=1.8 (s, 3H, CH₃)

2.0 (m, 2H, 4-H)

2.9, 3.2-3.6 (m, in total 10H,

1-, 2-, 5-, 6- and 7-H)

3.8 (t, 2H, 3-H)

7.5 (d, 2H, aromatic H)

7.8 (d, 2H, aromatic H)

8.0 (brs, 1H, NH) ppm.

EXAMPLE 11

50 g of the compound described in Example 2b were introduced into 150 g of 100 % strength by weight sulfuric acid at from 35 to 40° C. with ice cooling and the mixture was stirred at room temperature for 12 h.

After the reaction had ended (TLC), the reaction mixture was poured onto 450 g of ice and the resulting mixture was adjusted to pH 5 by sprinkling with sodium carbonate while stirring and cooling.

The result obtained was an electrolyte-containing solution of the compound of the formula ##STR19## which can be used for subsequent reactions, in particular dye syntheses, without further purification.

EXAMPLE 12

50 g of the compound described in Example 2b were introduced into 150 g of 24% strength by weight oleum at from 35 to 40° C. with ice cooling and the mixture was stirred at 85° C. for 6 h.

After the reaction had ended (TLC), the reaction mixture was poured onto 450 g of ice and the resulting mixture was adjusted to pH 5 by sprinkling with sodium carbonate while stirring and cooling.

After cooling down to 0-5° C., the mixture was stirred at that temperature for 1 h, and the precipitated sodium sulfate was then filtered off.

The result obtained was an electrolyte-containing solution of the compound of the formula ##STR20## which can be used for subsequent reactions, in particular dye syntheses, without further purification.

The same method affords the compounds listed in the table which follows.

    __________________________________________________________________________     1 #STR21##     Ex. No.           2 #STR22##         E        Q     __________________________________________________________________________     13           3 #STR23##         CH.sub.2 CH.sub.2 CH.sub.2                                       OSO.sub.3 H     14           4 #STR24##         CH.sub.2 CH.sub.2 CH.sub.2                                       OSO.sub.3 H     15           5 #STR25##         CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2                                       OSO.sub.3 H     16           6 #STR26##         CH.sub.2 CH.sub.2 CH.sub.2                                       OSO.sub.3 H     17           7 #STR27##         CH.sub.2 CH.sub.2 CH.sub.2                                       OSO.sub.3 H     18           8 #STR28##         CH.sub.2 CH.sub.2 CH.sub.2                                       OSO.sub.3 H     19           9 #STR29##         CH.sub.2 CH.sub.2 CH.sub.2                                       OSO.sub.3 H     20           0 #STR30##         CH.sub.2 CH.sub.2 CH.sub.2                                       OSO.sub.3 H     21           1 #STR31##         CH.sub.2 CH.sub.2 CH.sub.2                                       OSO.sub.3 H     22           2 #STR32##         CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2                                       OSO.sub.3 H     23           3 #STR33##         CH.sub.2 CH.sub.2 CH.sub.2                                       OSO.sub.3 H     24           4 #STR34##         CH.sub.2 CH.sub.2 CH.sub.2                                       OSO.sub.3 H     25           5 #STR35##         CH.sub.2 CH.sub.2 CH.sub.2                                       OSO.sub.3 H     26           6 #STR36##         CH.sub.2 CH.sub.2 CH.sub.2                                       OSO.sub.3 H     27           7 #STR37##         CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2                                       OSO.sub.3 H     28           8 #STR38##         CH.sub.2 CH.sub.2 CH.sub.2                                       OH     29           9 #STR39##         CH.sub.2 CH.sub.2 CH.sub.2                                       OSO.sub.3 H     __________________________________________________________________________ 

We claim:
 1. Sulfonyl compounds of the formula I ##STR40## where n is 0, 1 or 2,Y is vinyl or a radical of the formula C₂ H₄ Q, where Q is an alkali-detachable group, E is C₃ -C₆ -alkylene with or without interruption by 1 or 2 oxygen atoms in ether function, Ar is the radical of benzene or naphthalene, and R¹, R² and R³ are independently of each other hydrogen, C₁ -C₆ -alkyl with or without amino or C₁ -C₄ -alkanoylamino substitution, C₁ -C₆ -alkoxy, hydroxyl, halogen, nitro, amino, C₁ -C₄ -alkanoylamino, mono- or di(C₁ -C₆ -alkyl)amino, hydroxysulfonyl, carboxyl, carbamoyl, mono- or di(C₁ -C₆ -alkyl)carbamoyl, sulfamoyl, mono- or di(C₁ -C₆ -alkyl)sulfamoyl, cyano or a radical of the formula (NH--)_(m) (CH₂ --)_(q) SO₂ --Y, where m is 0 or 1, q is 0, 2 or 3, and Y is as defined above.
 2. Sulfonyl compounds as claimed in claim 1 wherein n is 0 or
 2. 3. Sulfonyl compounds as claimed in claim 1 wherein E is C₃ - or CH₄ -alkylene.
 4. Sulfonyl compounds as claimed in claim 1 wherein Ar is the radical of benzene.
 5. Sulfonyl compounds as claimed in claim 1 wherein R¹ is C₁ -C₄ -alkyl with or without amino or C₁ -C₄ -alkanoylamino substitution, nitro, amino or C₁ -C₄ -alkanoylamino and R² and R³ are independently of each other hydrogen, C₁ -C₄ -alkoxy, hydroxyl, halogen, hydroxysulfonyl or carboxyl.
 6. Sulfonyl compounds as claimed in claim 1, wherein said group Q is chlorine, bromine, C₁ -C₄ alkylsulfonyl, phenylsulfonyl, OS₃ H, SSO₃ H, OP(O) (OH)₂, C₁ -C₄ -alkylsulfonyloxy, phenylsulfonyloxy, C₁ -C₄ -alkanoyloxy, di(C₁ -C₄ -alkyl)amino or a radical of the formula ##STR41## where L¹, L² and L³ are independently of each other C₁ -C₄ -alkyl or benzyl and An.sup.⊖ is an equivalent of an anion, wherein said anion is fluoride, chloride, bromide, iodide, mono-, di- or trichloroacetate, methanesulfonate, benzenesulfonate and 2- or 4-methylbenzenesulfonate.
 7. Sulfonyl compounds as claimed in claim 1, wherein bridging group E is (CH₂)₃, (CH₂)₄, (CH₂)₅, (CH₂)₆, CH(CH₃)CH₂, CH(CH₃)CH(CH₃), (CH₂)₂ O(CH₂)₂, (CH₂)₂ O(CH₂)₃, (CH₂)₃ O(CH₂)₃ or (CH₂)₂ O(CH₂)₂ O(CH₂)₂.
 8. A sulfonyl compound of the formula: ##STR42## wherein Y is vinyl, 2-sulfatoethyl, 2-chloroethyl or 2-acetyloxyethyl;E is C₃ -C₄ -alkylene and R¹ is a C₁ -C₄ alkyl optionally substituted by amino or C₁ - or C₂ -alkanoylamino; nitro, amino or C₁ -C₂ -alkanoylamino. 